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Physics Question Help:

  1. Jun 4, 2008 #1
    A photon with a frequency of 5.8 × 1014 Hz strikes a clean, negatively charged potassium plate. The work function of potassium is 3.6 × 10-19 J. Calculate the kinetic energy of an electron ejected from the plate by this electron.

    Explanation is here i think:

    bbc.co.uk/scotland/education/bitesize/higher/physics/radiation/optoelectronics1_rev.shtml

    I don't understand anything in physics and I have this home test, and this is the only question I need answered. If you can please help me, I would greatly appreciate it. Thank you ^^
     
  2. jcsd
  3. Jun 4, 2008 #2

    Kurdt

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    What have you done yourself? That page is very clear and basically gives you all the tools you need to answer the question.
     
  4. Jun 4, 2008 #3
    I got 2.454x10^-20 J as my final answer
     
  5. Jun 4, 2008 #4

    Kurdt

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    Looks ok to me.
     
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